CDVA (Cooldown Vocal Announcement) Classic/TBC

Finally updated and ready for TBC!

Added features:

• /cdva to access in-game configuration menu
• Per-spell enable / disable checkboxes
• Scrollable spell list (class-based)
• Spell icons displayed next to each spell
• Standalone config window fallback (always opens)
• “Enable All / Disable All” buttons
• Independent CDVA volume slider
• Centralized sound playback hook (all sounds respect volume)
• Test-sound support (temporarily disabled)
• Improved spellID handling to prevent wrong announcements